Furnace



(-No Model.)

B. L. WA LKER. FURNACE.

No. 439,705" Patented Nov. l, 1890.

Wig E5 5125.

one part of the grate than through its other UNITED STATES PATENT OFFICE.

ROBERT LOUDON. TVALKER, OF BOSTON, MASSACHUSETTS.

FU RNACE SPECIFICATION forming part of Letters Patent No. 439,705, dated November 4, 1890.

Application filed February 3, 1890.

To all whom it may concern:

Be it known that 1, ROBERT LOUDON WALKER, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Furnace, of which the following is a specification,reference being had to the accompanying drawings, in which is shown a sectional elevation of a so-called pipe-boiler furnace embodying my invention.

The object of my invention is to produce a furnace which saves fuel and preven ts smoke; and my invention consists in the hereinafterdescribed combination of a fiI'G'bOX, grate, divided ash -pit, and arrangement of drafts whereby a stronger draft is passed through part.

In the .drawings,A is a boiler; B, a furnace; D, the fire-box; F F, the ash-pit, and G" the grate. The air-blast chamber F is formed by a partition f, dividing the ash-pit into two chambers, and a blast is introduced into the chamber F by any suitable means, preferably through a pipe f, which is introduced at any convenient place. That portion of the grate which is over chamber F is a shaking or like grate to keep the quick-burning fire thereon free from clinkers and to allow the accelerated draft freer passage. The ordinary draft is, as usual, through chamber F of the ash-pit, and as the products of combustion under the influence of this draft pass toward the fines they pass over that portion of Serial No. 339,005. (No model.)

the fire which is quickened by the air-blast from chamber F, whereby the smoke and gases are very perfectly consumed, the products of combustion arising from the greener part of the fire being directed by a deflector H, mounted above grate G, upon the quickened portionof the fire.

I do not claim herein the combination of a deflector with a grate, a portion of which may be shaken independently of its other portion, as that combination is set forth and claimed in my application, Serial No. 343,143, filed March 8, 1890.

WVhat I claim is- In a furnace, the combination of a fire-box, grate, and ash-pit divided into two chambers, with a deflector and means substantially such as described-for example, a forced draftfor causing a draft through one part of the grate greater than the draft through the other part of the grate, that part of the grate through which the stronger draft passes being a shaking grate, and the deflector being arranged over the grate to direct products of combustion arising from the fire on that part of the grate through which the Weaker draft passes over the fire on that part of the grate through which the stronger draft passes, substantially as and for the purpose set forth.

ROBERT LOUDO1\ WALKER. Witnesses:

J. E. MAYNADIER, EDWARD S. BEACH. 

